Leaf-spring.



W. J. HARRISON.

LEAF SPRING. ArrLIoATloN FILED un. e, 190e.

. 933,441, Patented Sept.7,1909.

ATTORNEYS WILLIAM JOHN HARRISON, OE WEST DERBY, VERMONT' AssIGiv OR 0F ONE-HALF T0 GEORGE C. ADAMS, 0F WEST DERBY, VERMONT.

LEAF-SPRING.

` Specification of Letters Patent.

Patented Septx, 1909.

Application` led April 6, 19t-)9.` Serial No. 488,211.

To all whom it may concern:

Be it known that I, WILLIAM JOHN HAE- nIsoN, a subject of the King of Great Britain, and a resident of Vest Derby, in the county of Orleans and State of Vermont, have invented a new and Improved Leaf- Spring, of which the following is a full, clear, and exact description.

The inventionis an improvement in leaf springs particularly adapted to motor vehicles, and is designed to arrest the rebound which the conventional spring ordinarily gives when the vehicle is in motion. This I accomplish by providing the vehicle frame with spring hangers, and a leaf spring contractible in length under the weight of the r load, having its opposite ends connected to the hangers.

Reference is to be had to the accompanying drawings forming a part of this specication, in which similar characters of reference indicate corresponding parts all the views.

Figure l is a side view, partly in central vertical section, of a spring embodying my invention as applied to the frame Of a motor vehicle; Fig. 2 isl a plan Of the spring detached from the spring hangers; and Fig. 3 is a cross-section through the spring on the line 3-3 of Fig. 2. l

The sprin as shown is semi-elliptical in form and o leaf construction. The inner leaf (by which I mean the leaf adjacent, to the concave side of the spring) is constructed of two sections 5, 5, each terminating a slight distance from the `center of theV spring, and at its opposite and outer end yprovided with an eye 6 to support the spring .Y

rom the hangers 7, 7, ordinarily secured to the frame of the` motor vehicle. The severalleaves of the spring, as is the usual praetice in spring construction, successively diminish in length at each end in passing from t0 the outer or convex side of the spring, all Of the leaves, witlrlthe exception of the Inner leaf or leaf sections 5, bein secured together atthe center of the `spring y a bolt or` other -under the weight of the load and wi vequivalent device 8. The 'leaves of the members connected together by cross-bolts,

with one Of the cross-bolts secured to one end of the outer and shortest leaf of the spring, and the other cross-bolt secured to one of the leaf sections', the connection of the leaves to the cross-bolts being effected by bending the ends of the leaves around the cross-bolts, inthe form of eyes. The secondA leaf 10 from the inner side of the spring, at each. end carries a roller 1l arranged over and bearing on the upper facey of,one of the spring sections 5 and adapting the leaf 10 to move over the sectional leaf with the least possible friction when the spring is loaded.

With the spring applied as shown in Fig. l, it will be shortened in straightenin out gain its form as the vehicle passes over a rough place in the road, without rebounding, this being prevented by reason of the construction and assemblage of the leaves and the restrainin of the spring ends. The manner in whichthe spring is applied to a vehicle tends tO- prevent the breaking of the sprin aty they center where it'is clipped to the ax esince the Weight of the load is equally distributed to all points of the spring.

Having thus described my invention, I claim as new and desire to secure by Letters Patent: The combination of a vehicle frame, and a leaf spring contractible and extensible in length under pressure, havin its opposite ends secured toxed points o the frame.

In testimony -whereof I have signed my name to this specication in the presence of two subscribing witnesses.

WILLIAM JOHN H ARRIsoN. 

